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StepFun 3.5 Flash
stepfun·stepfun/step-3.5-flash-4·GA·Open weights
StepFun flash lane for quick multimodal reasoning and coding assistance
At a glance
Reference price$0.09 / $0.30 per 1M
Cache read $0.02 · Vercel AI Gateway
Lowest paid$0.09 / $0.30
Vercel AI Gateway Cloud
Context262,114
Output limit262,114
Capabilities
✓ Reasoning✓ Tool use? Structured output✓ TemperatureAttachments
Modalities
TextImage
Knowledge cutoff2025-01
Released / updated2026-01-29 / 2026-02-13
Quality & performance
Artificial Analysis doesn't cover this model (267 of 2059 have data). Quality data comes from independent evals covering widely used models.
Available at 1 providers1 with public prices
| Provider | Tier | Input | Output | Cache read | Cache write | Context | Output limit | Status |
|---|---|---|---|---|---|---|---|---|
| Vercel AI Gateway stepfun/step-3.5-flash | Cloud | $0.09 | $0.30 | $0.02 | — | 262,114 | 262,114 |
Sorted by blended price (input×0.75 + output×0.25) asc. The official channel always shows regardless of rank. Whether a gateway's low price is actually usable can't be verified.
Your usage cost
1Vercel AI Gateway$24.60
The cheapest paid channel is the only channel.
Benchmark
No upstream benchmark data for this model. For quality, see the Artificial Analysis intelligence score above.
Reasoning control
effort = loweffort = mediumeffort = high
Related models
GLM-4.7-Flashcheaper alternative$0 / $0Hy3cheaper alternative$0 / $0Nemotron 3 Nano 30B A3Bcheaper alternative$0 / $0Qwen3.7 Flashcheaper alternative$0.03 / $0.118
Price historyone sample accumulated per data sync
Input listOutput listMin blended